Blind stitch sewing machine



March 12, 1935. A. STROBEL BLIND STITCH SEWING MACHINE s snets-sneez 1 IN VE IV TOR Apmus STROBEL. '3 av Filed March 16, 1932 March 12,1935, 1 A. STROBEL BLIND STITCH'SEWING MACHINE.

3 Sheets-Sheet 2 Filed March .16, ps2

01 1 5170? ALFONS STRoBEL;

Patented 12, 1935' UNITED STATES PATENT OFFICE Application March 16,1932, Serial No. 599,275 In Germany July 20, 1931 3 Claims, (cl. 112-178) With the usual blindstitch sewing machines, including the modern machines for rolled work, it is necessary when sewing the lapels of coats and the like to pass the work in difierent directions through the machine, sewing the right. hand lapel from bottom to top and the left hand lapel from top to bottom, because the front portion of the garment must always be on the left side of the machine. This is due to the fact that the standard or pillar supporting the arm and body of the machine, on the right hand side of the head, form an obstruction preventing the passage of a large piece of work. It has the disadvantage that there is a certain lack of uniformity in the work, as thelayers of fabric sewn together are given a slight bias or shift in passing through the machine, and this bias is in opposite directions on the two sides of the garment.

The object of my invention is to avoid this defeet, and to this end I construct the machine with the head extending from the arm approximately in horizontal alinement therewith, and with the work feeder arranged to feed the work substantially parallel with the head and arm towards the pillar. With this arrangement the lapel of a coat can be sewn with the garment either on the right or on the left of the operatorQas it will not in either case be obstructed by the pillar, but will pass to the right or to the left of the same. Both lapels can, therefore, be sewn from top to bottom,v or from bottom to top, so that the bias which I have referred to is avoided.

A machine constructed in accordance with the invention is shown'in the accompanying drawings, in which Fig. 1 is a side elevation thereof,

Fig. 2 a plan view, partly in section,

Fig. 3 a section on the line nn-m of Fig. 2,

Fig. 4 a section on the line IV-IV of Fig. 1,

Fig. 5 a section on the lineV-V of Fig. 4, and

Fig. 6 a section on the line VI--VI of Fig. 2.

The body 1 comprises an approximately horizontal arm 1a and an elongated foot 121, with a hollow pillar 1c rising from the foot and carrying the arm. The arm is in line, or approximately in line, with the head 2 which it carries, the head facing towards the person using the machine, with the body 1 of the machine behind it, so that the user can work freely on both sides of the ead.

The hollow pillar 1c is of approximately tri-' angular cross-section. The foot 11) is narrow and has a hollow ridge witha longitudinal channel therein for a thrust bar 2'7.

The work support arm 33 is pivoted at 34 to the foot lb to rock vertically, and has an actuating arm 33a for adjusting the'depth of the stitch.

A spring 35 bears on this arm, holding it down so that a stud 35a, screwed into the arm and projecting therefrom rests on the base of the ma- 5 chine. By turning the stud 35a coarse adjustment of the level at which the work support is held can be effected. For more delicate adjustment there is a nut 36 at the top of the machine, screwed to the rod of a plunger 37 working in a vertical bore, and the plunger is connected by'link 38 to the lever arm '33a.

The machine is driven by a pulley 3 having a fly wheel or hand wheel 4 on its shaft 5. On this shaft there is a spur wheel 6 meshing with a spur wheel 7' on a shaft 8. On the shaft 8 there is ball shaped eccentric 9, with a rod 10 connected to the crank 11 of the needle shaft 12, for rocking the needle lever 13. V

A worm wheel 14 on the shaft 8 engages a worm wheel 15 on a shaft 16, Which'actuates the feeder bar 40 by means of an eccentric 17. The feeder mechanism is of conventional design.

A crank disc 18 on the shaft 16 has an inclined pin 19 with a Cardan joint 20 thereon, for driving the presser foot shaft 21, timed to work with the needle.

0n the shaft 5 there is a bevel wheel 23 engaging a bevel wheel 24 on a shaft 25 having a crank 26, and to this crank the rod 27 is connected, for actuating a rock arm 28 pivoted at 29. A rod 30 is pivoted at 31 to this arm, for actuating the work bender or saddle 32.

What I claim as my invention and desire to secure by Letters Patent of the gUnited States 35 gltudinal channel therein, a hollow pillar rising from one end of said foot, an arm extending from said pillar substantially parallel with said foot, driving mechanism mounted in said pillar and said arm, a head carried by said arm substantially in horizontal alinement therewith, sewing and feed mechanism carried by said head, said feed mechanism being adapted to feed the work substantially parallel with said head and 'said arm towards-said pillar, a thrustbar in the channel of said foot, and work bending mechanism actuated by said thrust bar. 59

2. A blind stitch sewing machine'having a horizontally elongated 'foot, said foot having alongitudinal channel therein, a hollow pillar rising from one end of saidfoot, an arm extending from said pillar substantially parallel with said foot,

said arm, a head carried by said arm substantially in horizontal alinement therewith, sewing and feed mechanism carried by said head, said feed mechanism being adapted to feed the work substantially parallel with said head and said arm towards said pillar, an arm pivoted to said foot for rotation in a vertical plane, work bending mechanism carried by said verticallv rotatable arm, and a thrust bar in the channel of said foot, actuated by said driving mechanism and actuating said work bending 1,994,117 driving mechanism mmmted in s'aidfpillar and drivingmechanismmolmtedinsaidpillarand saidarm,aheadcarriedbysaid.armsubstantially in horizontal therewith, sewing and feed carried-by said head, said feed mechanism being-adaptedtoteedthe work substantially parallel with said head and said armtowards said pillar, anarmpivotedto' said foot for rotation in avertical plane, a spring connected to said vertically rotatable arm, urgingthesamein onedirectimmeansfor limiting the to said ,ver-- ticallyrotatable arm, work bending mechanism carried by said vertically rotatable 'arm,,and 1a thrustbarinthechannelotsaidiootactuated by said drivingmechanim and M w: said workbendingm I 

